The average weight of 25 students is 50 kg. If the weight of teacher is included, average increases by 1 kg. What is teacher's weight? MCQ with Answer and Explanation

Question

The average weight of 25 students is 50 kg. If the weight of teacher is included, average increases by 1 kg. What is teacher's weight?

A. 75

B. 74

C. 80

D. 76

Answer: Option D

Solution (By JKSSB Mock Tests)

Total students weight=1250. New total for 26=26×51=1326. Teacher=1326-1250=76 kg.

This question belongs to: Maths Average

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Question #1

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Average of 9 numbers 2140. If average of 6 is 2135, average of remaining 3?

A. 2150

B. 2155

C. 2148

D. 2145

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Correct Answer: Option A

Explanation:
Sum9=19260. Sum6=12810. Remaining=6450. Average=2150.

This question belongs to: Maths Average

Question #2

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Average of 40 students is 50. If average of 10 is 60, average of remaining 30?

A. 47

B. 46.67

C. 48

D. 45

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Correct Answer: Option B

Explanation:
Total=2000. 10=600. Remaining=1400. 1400/30≈46.67.

This question belongs to: Maths Average

Question #3

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What is the average of the first 5 composite numbers?

A. 7.4

B. 7.6

C. 8.0

D. 7.2

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Correct Answer: Option A

Explanation:
First 5 composites: 4,6,8,9,10 sum=37, avg=37/5=7.4.

This question belongs to: Maths Average

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